package com.example.test0519;

import org.springframework.http.HttpStatus;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String reqPath = request.getServletPath();
        //只有返回true才会继续向下执行,返回false取消当前请求
        HttpSession session = request.getSession();
        if (session == null || session.getAttribute("user") == null) {
            //log.trace("access#{},not logged in,return",reqPath);
            //response.setStatus(HttpStatus.UNAUTHORIZED.value());
            response.sendRedirect("/login");
            return false;
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}